title: The three A symmetry Raman modes of kesterite in Cu2ZnSnSe4.
abstract: We investigate CZTSe films by polarization dependent Raman spectroscopy. The main peaks at 170 cm(-1), and 195 cm(-1) are found to have A symmetry. The Raman signal at 170 cm(-1) is found to be composed of two modes at 168 cm(-1) and 172 cm(-1). We attribute these three Raman peaks to the three A symmetry modes predicted for kesterite ordered Cu(2)ZnSnSe(4). The main Raman peak is asymmetrically broadened towards lower energies. Possible sources of the broadening are tested through temperature and depth dependent measurements. The broadening is attributed to phonon confinement effects related to the presence of lattice defects.
authors.forename: Rabie
authors.initials: R
authors.lastname: Djemour
authors.forename: Alex
authors.initials: A
authors.lastname: Redinger
authors.forename: Marina
authors.initials: M
authors.lastname: Mousel
authors.forename: Levent
authors.initials: L
authors.lastname: Gütay
authors.forename: Xavier
authors.initials: X
authors.lastname: Fontané
authors.forename: Victor
authors.initials: V
authors.lastname: Izquierdo-Roca
authors.forename: Alejandro
authors.initials: A
authors.lastname: Pérez-Rodríguez
authors.forename: Susanne
authors.initials: S
authors.lastname: Siebentritt